Ok i can understand the theory behind this but, and there is always a "but", how can one be certain in a bolt rifle that the case does not move, rotate, when you close the bolt? I can see this working perfectly with a break action such as a contender but i can also see my bolt moving my case a little as i close the bolt and not doing it consistently with each case. That's right the old gas cloud just threw a monkey wrench in the finely oiled machine.